.classteaching>p {
  margin-bottom: 10px;
}

// .classteaching{
//   padding: 61px;
// }
.hidefont {
  width: 300px;
 overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  margin-top: 8px;
}

.clb:after {
  content: "";
  display: block;
  clear: both;
}

.clb>div {
  border: 2px solid transparent;
  cursor: pointer;
}
.clb>.borderc{
  border: 2px solid red;
}